On Fri, 22 May 2026 19:08:39 GMT, Coleen Phillimore <[email protected]> wrote:

>> This is a "*sub-review pull request*" for the first 
>> [preview](https://openjdk.org/jeps/12) of [JEP 401: Value Classes and 
>> Objects](https://openjdk.org/jeps/401), specifically 
>> [JDK-8317278](https://bugs.openjdk.org/browse/JDK-8317278): JVM 
>> implementation of value classes and objects.
>> 
>>> [!NOTE]
>>> This pull request and the other sub-review pull requests listed below are 
>>> based on the "*master pull request*" 
>>> (https://github.com/openjdk/jdk/pull/31120). It contains the same full set 
>>> of code changes as the "*master pull request*" to preserve the full 
>>> implementation context; the language compiler, JVM, and standard library 
>>> changes are intertwined. This separate pull requests exist only to 
>>> subdivide the review and related discussion by area.
>> 
>> Other areas for review:
>> 
>> - [JDK-8317277](https://bugs.openjdk.org/browse/JDK-8317277): Java language 
>> implementation of value classes and objects
>>   - https://github.com/openjdk/jdk/pull/31121
>> - [JDK-8317279](https://bugs.openjdk.org/browse/JDK-8317279): Standard 
>> library implementation of value classes and objects
>>   - https://github.com/openjdk/jdk/pull/31123
>> 
>> Code changes resulting from the review process should be made in 
>> [`valhalla/lworld`](https://github.com/openjdk/valhalla/).
>> 
>> `valhalla/lworld` is currently updated from `jdk/master` whenever a weekly 
>> [`jdk` tag](https://github.com/openjdk/jdk/tags) is created. At that time, 
>> code changes from `valhalla/lworld` will be propagated to the master pull 
>> request and to all sub-review pull requests, including this one.
>> 
>> Ultimately, review sign-off will be recorded on the "*master pull request*", 
>> and this pull request will be closed without integration.
>> 
>> This pull request has a large code surface area and often conflicts with 
>> `jdk/master` on a daily basis. Refer to 
>> [`valhalla/lworld`](https://github.com/openjdk/valhalla/) for the latest 
>> state of the project code, keeping in mind that it may lag several days 
>> behind `jdk/master`. Both repositories may be needed as references during 
>> review.
>> 
>> ---------
>> - [x] I confirm that I make this contribution in accordance with the 
>> [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai).
>
> src/hotspot/share/classfile/classFileParser.cpp line 6370:
> 
>> 6368:     FieldInfo& fieldinfo = _temp_field_info->at(i);
>> 6369:     if (fieldinfo.access_flags().is_static()) continue;  // Only 
>> non-static fields are processed at load time
>> 6370:     Symbol* sig = fieldinfo.signature(cp);
> 
> This has a lot of logging with as_C_string() calls which use ResourceArea. I 
> don't know how far up the execution stack there is a ResourceMark but I think 
> there should be one in this method so that resource area doesn't need to 
> reallocate arena chunks.

I can fix this in https://bugs.openjdk.org/browse/JDK-8385343

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/31122#discussion_r3291066884

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